• Korean Journal of Cognitive Science
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• v.23 no.1
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• pp.97-107
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• 2012

Previous studies on opinion mining and sentiment analysis have supposed that the polarity and value of an emotional word is reversed when a negation word is attached. However, there are no quantitative studies on how much the polarity is changed when a negation word is following. Therefore, we measured the valence and arousal dimensions for Korean emotional words and their negations. Consequently, the polarity of valence and arousal was reversed on their intermediate level. Also, the value was reduced by about 30% to 50%. We propose this result as a guideline for processing negation words for studies on opinion mining and sentiment analysis.

• Journal of the Korean Data and Information Science Society
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• v.26 no.5
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• pp.1167-1173
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• 2015

The development of information and communication technology like SNS, blogs, and bulletin boards, was provided a variety of places where you can express your thoughts and comments and allowing Big Data to grow, many people reveal the opinion of the social issues in SNS such as Twitter. In this study, we would like to pre-built sentimental dictionary about social issues and conduct a sentimental analysis with structured dictionary, to gather opinions on social issues that are created on twitter. The data that I used is "bikini", "nakkomsu" including tweet. As the result of analysis, precision is 61% and F1- score is 74%. This study expect to suggest the standard of dictionary construction allowing you to classify positive/negative opinion on specific social issues.

• Journal of the Korean Data and Information Science Society
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• v.27 no.4
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• pp.845-854
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• 2016

Sentiment analysis or opinion mining is a technique of text mining employed to identify subjective information or opinions of an individual from documents in blogs, reviews, articles, or social networks. In the literature, only a problem of binary classification of ratings based on review texts in an online review. However, because there can be positive or negative reviews as well as neutral reviews, a multi-class classification will be more appropriate than the binary classification. To this end, we consider the multi-class classification of ratings based on review texts. In the preprocessing stage, we extract words related with ratings using chi-square statistic. Then the extracted words are used as input variables to multi-class classifiers such as support vector machines and proportional odds model to compare their predictive performances.

• The Journal of Korean Medicine
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• v.43 no.3
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• pp.94-105
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• 2022

Objectives: This study investigated public opinion on the use of modern diagnostic medical devices by Korean Medicine doctors. Methods: A questionnaire looking into perceptions on the use of modern medical devices was developed. It was distributed by a third party and data was collected. Results were analyzed through frequency analysis, chi-square analysis (χ²-test), frequency and cross analysis using R program. The measurement variable in the study was the respondent's perspectives and expectations on the use of modern diagnostic medical devices by Korean Medicine doctors. The maximum significance level was 0.05. Results: There were a total of 3,000 responses and 80.8% of the respondents replied that there is a need for government-level discussion on endowing rights to Korean Medicine doctors as supervisors for safety management of radiation generating devices. Also, 83.3% of the respondents agreed the use of ultrasound imaging equipment in Korean Medicine clinics should be legalized. Conclusions: According to this study, respondents strongly support the use of modern diagnostic medical devices by Korean Medicine doctors. This is the first study to investigate public opinion in this area and it provides a significant insight into the public needs and desires for a wider scope of practice for Korean Medicine in the healthcare system.

• Journal of Information Technology Services
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• v.13 no.4
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• pp.397-410
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• 2014

For mobile service organizations, it is one of the most important tasks to reflect users' opinions rapidly and accurately. In this study, the process is defined to elicit requirements of software/system improvement for mobile application by extracting and refining from users' opinion in mobile app, and detailed activities procession method in this processing are also proposed. The process consists of 3 activities to get requirements of software/system improvement for mobile app. First activity is to transform mobile app to software structure and define term dictionary. Second activity is to elicit simple sentences based on software from users' opinion and refine them. The last activity is to integrate and adjust refined requirements. To verify the usability and validity of the proposed process and the methods, the outputs of manual processing and semi-automated processing were compared. As a result, efficiency and improvement possibility of the process were confirmed through extraction ratio of requirements, comparison of execution time, and analysis of agreement ratio.

• Asian Journal for Public Opinion Research
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• v.1 no.3
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• pp.217-231
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• 2014

This study begins with a review of commonly discussed dimensions of public risk perception that may influence public opinion toward risks. Factors that have been revealed by the literature to have substantial impact on risk perception, such as demographic background, trust, and media environment, are also discussed. Meanwhile, we evaluate two well-known research models in the realm of risk analysis: 1) the psychometric paradigm, and 2) the social amplification of risk framework (SARF). Based on a literature review, this study suggests that, besides the psychological and social approach, models of risk perception and risk communication research should shift to a more comprehensive one by considering the interrelations between laypeople and the environment. This study proposes a research model from the perspective of social cognitive theory (SCT) as a potential framework for future studies: 1) in the societal environment, individuals' risk perception and information seeking behavior, which is determined by risk perception will be influenced by trust in regulators and interpersonal trust; 2) in the media environment, individuals' risk perception and information seeking behavior will be influenced by individuals' perceived information characteristics. Knowledge about risk accumulated through information seeking will change risk perception in a longitudinal process.

• Asian Journal for Public Opinion Research
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• v.5 no.1
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• pp.1-14
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• 2017

The Fukushima nuclear accident caused by an earthquake and a subsequent tsunami on March 11, 2011 has seriously impacted the environment surrounding the Fukushima Daiichi nuclear power plant. While all the residents near the plant were evacuated from the area deemed uninhabitable after the accident, residents of the neighboring area outside of the evacuation zone still seem to live in fear of invisible radiation. To understand Fukushima residents' thinking about the environmental risks that accompany a nuclear disaster, we utilize a poll of the residents of Fukushima conducted in 2013. Based on the survey data, we reveal factors that seem to strongly affect their knowledge and concerns about nuclear power plants. The results of the multivariate analysis show the importance of the following two factors: (1) confidence in mass media, and (2) trust in institutions in charge of administering the accident, especially the central government, the Nuclear and Industrial Safety Agency, and Tokyo Electric Power Company. We conclude that the more people trust mass media and particular institutions, the more likely it is that they are have an elevated sense of anxiety and fear of the presence of nuclear plants.

• Asian Journal for Public Opinion Research
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• v.5 no.3
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• pp.175-191
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• 2018

This exploratory study considers the difference between personal and perceived societal values related to South Korean women's role in the home, workplace, and society using eight items asked on the Korean Academic Multimode Open Survey (KAMOS), May-July 2017. Factor analysis showed that these eight items could be grouped into two categories: women's role in her family and women's in the outside world. Of the 2,000 respondents, 54.1% personally agreed that "Both the husband and wife should contribute to their family income." People in their 30s felt the largest gap between their personal and societal values; women also felt a larger gap than men. Those who watched television more were generally more conservative than those who used the Internet more. People who felt a smaller gap between societal and personal values were more likely to feel proud to be a Korean citizen. People who believe that it is better not to marry felt a bigger gap between some societal and personal values on items relating to whether a wife should work, whether a woman's housework or paid job is more valuable, and whether women's job performance is equal to men's. People who believe that divorce is sometimes acceptable were also more likely to feel a bigger difference in two items: the item about job performance and an item about whether a married woman's social status is dependent on her husband's.

• Management & Information Systems Review
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• v.8
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• pp.167-186
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• 2002

Since first introduced on July 1974, consolidated financial statements had been concluded or not depending on decision-makings by companies. But the Securities and Exchange Law as revised on April 1992 specified that any listed corporation must add consolidated financial statements and their auditor's opinion to its business report. foreign-based corporations became subject to the conclusion of the sheets and equity method from the time of business closing on Dec. 1995. Now all of domestic and foreign-based corporations, whether they are controlling or controlled businesses, are subject to consolidated financial statements. Business bankruptcies and restructuring under the economic crisis since the late 1997 raised the necessity of the increased reliability and transparency of consolidated accounting information and significantly changed contents of consolidated audit report. An analysis over the past three years shows that auditor's opinions about consolidated financial sheets are mostly qualified opinions whose proportion is being gradually decreased, while rejected opinions are annually increasing in proportion. When compared to the year of 1998, the numbers of those controlled businesses, and companies under the equity method were all decreased, but rather increased when determined on the basis of such numbers per a corporation. This suggests that corporations are promoting business diversification through business separation and share acquisition and advancing into foreign markets as well as domestic ones. Especially, special contents included in consolidated auditing report show a tendency to increase annually. Based on all these findings, the strengthening of accounting regulation will lead to providing more reliable information related to auditor's opinion about consolidated financial statements and raising the information effectiveness and validity of the statements as publicly notified.

• The Research Journal of the Costume Culture
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• v.15 no.4
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• pp.580-592
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• 2007

The purpose of this study is to analyse the foreigner's opinion about 'Hanllyu', and their buying behavior of clothes carried in Korean domestic market. The study was implemented through a normative-descriptive survey using self-administered questionnaires. The samples consisted of 75 foreigners residing in Korea. Data were analyzed by following statistical methods: frequency analysis, ${\chi}^2-test$, t-test, ANOVA, Scheffe's multiple range test. Results are as follows: There was no difference in the opinion about 'Hanllyu' between Chinese and Japanese. They regarded 'Hanllyu' as the phenomenon of the wave of Korean popular culture. Korean soap operas and movies were the main information sources on 'Hanllyu' stars for them. Significant differences were found in the behavior toward 'Hanllyu' stars according to sex and country, but there was no difference in the behavior according to their age. They mainly buy clothes in Dongdaemoon market and the main motivation of purchase were good design and price. The reason for dis-purchase was poor design. Respondents thought 'Hanllyu' fashion is gorgeous. There was significant difference in the behavior toward Korean culture according to sex.